Crank-shaft.



T. I. PAY z J. M. ELLSWORTH.

CRANK SHAFT. APPLICATION ILBDAPR. la. 1907.

2 SHEETS-SHEET 1.

.mimi

ATTORNEYS No. 870,502. PATENTED NOV. 5, 1907. T. J. PAY L J. M.ELLSWORTH.

I ATTORNEYS crank shafts, and more particularly to sectional or l THOMASJ. PAY, or NEW YORK, N.

Toall whom 'it 'may concern:

Be it known that we, THOMAS I. Fav, a resident of the city of New York,borough of Brooklyn, in the county of Kings and State of New York, andJOHN MAGEE ELLsWoRTn, a resident of Bernardsville', in the county ofSomerset' and State of New Jersey, both citizensof the' United States,have invented anew and Improved Crank-Shaft, of which the following is afull, clear, and exact description.

This invention relates to certain improvements in knockdown crank shaftsadapted for use in connection with engines, compressors, and the like,and the object of the invention is lto so construct the device that theshaft may be made ofthe minimum length and the ball bearing supportthereof may be brought -as close I to the throw as possible.

A further object of the invention is to provide a crank shaft having asectional hub, the sections of which separate upona plane at an langleto the axis of rotation, and said sections being so connected togetherthattbe rotary movement of one section in respect to the other isprevented by 'a plurality of small locking members and the longitudinalmovement of one section in respect to the other prevented by means ofsuitable clamping mechanism.

A further object of the invention is to provide means wherebyone'rotatable member may loe-held rigidly secured to anotherrotatablemember `and the resistance to rotation distributed uniformly among aplurality of bearing surfaces.

AFor securing the objects above referred to, We provide the oppositemeeting faces of the adjacent sections With a plurality of conicalrecesses having double taper buttons floating therein. In forcing thesections together, each of the buttonsis free to move lon, gitudinallyso as to engage within each of its recesses with equal pressure and isof such a size and shape that it becomes firmlywedged in each of itsrecesses 'W ien the sections are brought into contact. .'lhus, itis im`possible for ne of the buttonsto be in firmer engagement withon'e'section than with another, and it is also -impossible for any ofthe buttons to4 fail to be forced into place. Each and all of the`buttons receive anA qual'amOUn't of `lateral strain when one yof themem,S bers is rotated, Were separate clamping bolts ein` ployed, itwould be impossible to attain such mechan-A Specification of LettersPatent. Application filed A'pjril 8,1907. Serial No. 367,'025.

AND JOHN MAGEE ELLSWORTH NEW JERSEY.

, OF ll'lRNARDSVILLE,

' naaien-SHAFT.

Patented; Nov. 5,7 1907.

impossible for any one button to receive-anyA more lateral strain thanis borne by each of the other buttons. I V

A further object ofthe invention is to provide a clamping means forholding the sections in engagement with each other, which clamping meansmay also be employed .for separating the sections when it is desired totake thc structure apart. For securing this object, we provide acentrally disposed bolt hav-Y ing an annular iiange intermediate itsends and adjacent the meeting surfaces of the two sections, wherebyuponmoving the bolt longitudinally in respect to one of the sections theother section may be forced out of engagement with the first mentionedsection in a manner hereinafter more fullygset forth.

The invention consists in certain features of construction andcombination of parts, ,all of which will be fully set forth hereinafterand particularlyi pointed out in the claims. l l

Reference is to be'had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in both the figures, and in which Figure l is acentral vertical section through a portion oi a multi-cylinder engineprovided with ourim proved crankshaft; and FigA 2 is a verticaltransverse section on the line 2-'2 of Fig. l.

To more clearly illustrate the construction and operation oi ourimproved crank shaft We have illustrated a portion of an engine having apluralityoA cylinders l0 connected to a crank case l1 of any suitablecharacter. v The crank pase is preferably made up of upper and lowersections, and the portions of the crank are sub-divided intochambers'corresponding to the separate cylinders b-y means of the hubsof the crank shaft rand the supporting bearing therefor'. rlhe crankshaft .is made up of a plurality of sections, and each sectionpreferably comprises a pin l2,y crank arms 13A integral therewith, andvhub sectionfrll idtegralwiththe crank arms. The crank pin l2 serves tosupport a'piston rod i l2?- laving a separable bearing portion 12b ofany suit- 'able construction. The hub sections 14 unite. to form Athe hub of the crank shaft and are provided with means ,for securing the sametogether and means for rotatably mounting the same. Asillustrated, eachhub is made up of two oppositely disposed hub sections each supportingits crank a'rm, said sections Ahaving their adjacent faces meeting upona plane a't right angles to the `axis of rotation. Within these ymeetingfaces We proroo vide oppositely disposed axial recesses which tog ther AThe holt 16 and its flange 'l5 serves as means whereby the sect-ions inabel'orced apart. This is accomplished by first removing; the crank fromthe engine and then inserting a spacing inernber between the two crank'of onel section and contacting with one oi the nuts The nul, on theopposite end of the san-re boltis he nut in conigact with the spacingineens he ni; is held from longitudinal moves caused tu niove endwise,and the ilange n ging with the opposite hub section forces the latteront ei Contact wirfn the .first mentioned one and dran ch o the buttonsout oi one of its recesses.

Within the contacting face of each or' the hul; sections 'We provide aplurality of conical recesses, prel`e1- ably six in number and arrangedeoncentrieally in re spoot tothe loc ing bolt 16. The recesses of onehub section exactly correspond with the recesses oi the adjacent hub sctior., and within these recesses We provide a plurality oi small metaldowel buttons i8 in the forni of double truncaled cones and havingexactly the same taper the recesses in title hub section. lhe do burroneare preferably' slightly shorter than the combined depth oi theoppositely disposed recesses but are of such a that they become tightlywedged in place Within .r `li rec-csic. when the hub sections are forcedtrgrgeiher. in Y order lo accommodate lor any slight in uount oi instaldisplaced or shaved off by the orcing of the buttons into theirrecesses, we provide each of the recesses With a slightly beveled edgel!) which forros a ver-y small. annui-ar recess around the lbutton atits greatest diameter. This recess is shown in the drawings upon o.slightly exaggerated scale to more clearly disclose th' rue.

ln bringing 'the sections together, the floating dowel buttons lree tomove longitudinally so as to engage. rifle Walls of the opposed recesseswith equal pressure at all runes, and the buttons are of such size inrespect to .J hat they engage the Walls of the recesses belore themeeting surfaces o the sections contaetwA The sections are their forcedinto firm engagement and of the iuttons become wedged in place, anymetal shaved or aped oli entering tho recesses 19. Thus ions in. v.izeof the recesses or the but4 ns which ne in at accurate workmanshipcannot noi. es e any one button to bear more 'ted than is sus Y when,and no button e the recess ol one section Awithout #li exactly equalpressure the opposite rei .if th:- otlnzr s.' tion. No button can po.iywork n even and liiorin distribution ol the latisl secured. Therecesses are pre'erably spaced a uniform distance apart, whereby theangular edjnstnien. of the cranks may be variedat will denecting meansabove described is especially apparent 'when it becomes necessary tovary this angular adjust n new'and di ment. Were bolts or other clampingmeans employed, it might be mechanically possible to so space the holesand arrange the bolts whereby the strain could be uniformly distributedamong the several bolts, yet when one shalt is adjusted to a definiteangle iu respect to the adjacent shaft different openings are broughtopposite to each other and the perfect alinement which may have beenpossible before may be thus destroyed. By connecting the parts inaccordance with our invention, the slight inaccuracies in constructionimpossible t avoid are remedied by the Wedging action of the buttonsthey are forced into place, and the equal distribution o the strain issecured irrespective oi whether or nel; the recesses are specially boredfor one particular annular' adjustment 'of the cranks.

The outer circumferential surface ol' each hub section preferablycylindrical in form and provided with an outwardly directed flange 20serving te rigidly hold in place an annular race ring 2l .for the seriesof balls 22 constituting' the ball bearing. The crank case supports asimilar race ring 23 .\and the balls may be in sorted and spaced in anysuitable manner. vAs illustrated, We provide a plurality of telescopingspacing members 24 a provision which by holding the raceways 2l and 23eccentric, in respect to each other and collapsing each spacing,r memberto the limiting amount, permits of the insertion of the'balls and thespacing members and permits of their adjustment t0 the position shown inFig. 2 to positively prevent the accidental -escape of any of theballs.V .lt is, of course., understood that the balls may be secured andspaced by Various other means7 as that shown constitutes no portion oiour invention. i

Supported by the crank case and adjacenteach of the race rings 23, meansfor retaining oil or other lubricant within the bearings is preferablyprovided. ils shown, th means comprises two oppositely disposed annularplates 25 lying substantially parallel and closely adjacent the oppositesides of the race rings 2l and 23. each plate being held in place by acylindrical portion 2G terminating in an aunularange 27 secured betweenthe race ring 23 and the supporting 'crank case. These plates 25, lyingcloselyadjacent the ball bearing lon opposite sides, serve toeffectively subdivide the crank case into4 separate compartments, yonefor each crank and piston, whereby the crank case may be used as an airor explosive mixture compression chamber, as is common in two-cycleengines.

Having; thus described our invention, we clair'n as ,e to secure byLetters .Patenti haft made up ol n. plurality or sections havurfuces'zrcinc uch other, said surfaces being prowltn oppositey disposedrecesses and rlowelbuttons .sr-ated wltlzin ld recesses betont olfengagement with lthe lxolilolns lin l il crank shaft runde un ol' nplurality of sections havc, .surfaces facing each other, said surfacesbeing provided with onpusil'ely disposed recesses :and tapered dowelbuttons wlllln Suid reve..

bringing r he sections rogerlier.

Il. A crank shaft: inode up ol n plurality `of sections having: surfacesfacingewli other, said surfaces belng pro vided with opposltely disposedtapered recesses and tupered duivel buttons Within said recesses,` 'andseated and l. A cran lnc centered hy the bringing of the sectionstogether;

s, sented und centered by the vided with an annular rowcf recesess and acentrally dlssconce posed passageway, a plurality of dowel buttonsseated within said recesses, and a centrally disposed bolt extendingthrough said passageway.

5. In a crank shaft, a hub made up ofla plurality of sections meeting ina plane at an angle to the axis ot' rotation, the meeting faces of theadjacent hub sections beiner4 provided with a plurality of pairs ofoppositely disposed recesses, a button located within each pair ofrecesses, and means for locking the sections together.

(i. In a crank shaft, a hub made up of a plurality of sections, themeeting faces of said sections being provided wit'li a plurality oipairs of oppositely disposed recesses, buttons located within each pairof opposed recesses and adapted to ioat to positions of equal pressure,and an axially disposed bolt rigidly securing said sections together.

7. In a crank shaft. a hub made up ol separate sections, the meetingsurfaces'ot' said sections heini,r provided with oppositely disposedconical recesses, a plurality of double conical buttons located withinsaid recesses, and lan axial bolt rigidly securing said sectionstogether.

8. A crank shaft made up of a plurality of sections having the meetingfaces thereof lying in a plane at an angle to the axis of rotation. andeach of said meeting' faces being provided with a plurality ofconicalirecesscs4 and means lying within said recesses and in engagementwith the oppositely disposed sections for preventing rotary movement ofone section in respect to the other.

9. A crank shaft made up of a plurality of sections, each of saidsections having a recess in the face thereof, and a locking boltbavini,r an annular iange in engagement with the recesses of theadjacent faces, and having lockingr nuts at euch end thereof.

l0. A crank shaft made up of a plurality of sections, each of saidsections having a recess in the face thereof, and a locking boli havinga projection extending into the recesses of the adjacent faces, saidlocking bolt serving to hold the sections in engagement with each other.

1l. A crank shaft made up of a plurality of sections, and a locking,bolt for holding the adjacent sections in en gagenient with each other,said bolt being provided with means adapted to engage with the sections,whereby they may be'forced out of engagement with each other by thelongitudinal movement of the bolt.

l2. In combination, a ball bearing including n race-ring having an outercircumferential bearing face, and two cranks each having a hub portionextending: into said race ring iroin the opposite ends thereof andengaging.l with the race ring,r to prevent movement thereof in the lineof the axis of rotation and the inner ends of said hubs facing eachother and lying in planes substantially at right angles to the axistif-rotation.

13. In combination. a ball bearing having a race ring having an outercircumferential bearing,I face, two cranks each having a hub portionextending into said race ring from the opposite ends thereof andengaging;- with the race ring to prevent movement thereof in the linevof the axis of4 rotation, und fricrionally engaging therewith toprevent the rotation thereof independent ot' the hub portonspand theinner ends of said hubs facing each other and lying in planessubstantially at right anales to the axis of rotation, and means forsecurinl;l the simultaneous rotation of said hub portions,

14. In combination, a plurality of cranks, each having two hub portionsand the hub portions of thc adjacent cranks lying in planes :it rightang-les to'the axis of rotation, a ball'bearing common to said adjacenthub portions. said bearingr including a 'race ring surrounding the hubportions in the piane of the opposed faces, and means for r idlysecuring, together the hub portions ot thc adjacent cranks the hubportions being constructed to bind the race ring in piace under theinfluence ot' said sccurinp; means.

l5. In combination, n plurality of cranks. each having two hub portions.the hub portions of the a-.ijacent cranks having opposed faces` lying inplanes at right angles to the axis of rotation', meins for securing thesimultaneous'rotn tion of the cranks, and a. ball' bearing common toboth hub portions, said bearing including a race ring surrounding theadjacent hubs and held by frictional engagement from rotation in respectto' the hub portions. i

16. A crank shaft made up oi" a plurality of sections, each sectionterminating in a face lying substantially at right angles to the axis ofrotation of the shaft and ndjacent the face of a similar section,independent and detacir able fastening means cach in engagement Withboth of said sections, one of said fastening means serving to plongitudinal movement ot' one section. in respect to the other and theother of said fastening means beingr disposed within said sections andserving to secure the simultaneous rotation of both sections, and a ballbearing surrounding the said sections in the plane of the opposed faces.

1T. In combination, a plurality of cranks, each having two hub portions,the hub portions of the adjacent cranks having opposed faces lying inplanes at right angles to the axis of rotation, means for securing thesimultaneous rotation of the cranks, a ball bearing common to both hubportions, said bearing including a race ring surrounding the adjacenthubs, and a locking' bolt extending through the adjacent hubs forlocking them together` said hub portions being:I provided with means forbinding said race'ring in pince under the influence of said locking holo. in combination, a plurality of crank; two hub portions, the huiportions oi the adjacent cranks facing; each other in a pinne at rightangles to the axis of rotation, and each bovine an annular flange, n eringsurrounding said hub portions and between said ilanges, and meansfor rigidly securing together the adjacent lub portions andsimultaneously binding said race ring in place between said flanges.

10. A device of the class described comprising a plurality of sectionseach having a plurality of conical reY cesses in its meeting face, and aplurality of double conical buttons adapted to trictionaliy engage withthe walls oi? said recesses without contacting with the Abottomsthereof, and be forced into place by tbc bringingl together' of thetions, said buttons being iongitudinally movable to ioat` to positionsof equal pressure.

Bil. Adevice ot' the class described comprising a pluraliiyof sectionscach having; a plurality of conical reY cesses in its meeting face, anda plurality of double conical buttons adapted to iioat to positions ofequal pressure within said recesses without contacting with the bottomsthereof when said sections are forced together.

21. A device of the class described comprising a plurality ot' sectionseach having a plurality of conical recesses in its meeting face, aplurality of double conical buttons adapted to frictionally engage withthe Walls ot said'recesscs without contacting with the bottoms thereof.and be forced into place by the bringing together et the se@ tions. saidbuttons ,being longitudinally movable tdiioai to positions ot equalpressure, and a clamping bolt havin' a projection adapted to en ige withone of' said sections for forcing said sections apart.

22. A. ldevice of the class described comprisins,j a pinA rality ofsections each havingl :i plurality ot' contrai recesses in its meetingtice. a plurality oi' double con' a! buttons adapted to iioai topositions of equal pressure ithin said recesses without contacting withthe bottoms thereof when said sections are forced together, and aclamping bolt having a projection adapted to engage with one ot' saidsections foil forcing said sections apart.

In testimony whereof' we have signed our mines to this specification inthe presence of two subscribing;- u'iini, sses.

THOMAS .'i. FAY. JOHN MAGICIG ifLLSVifUit'ii-f.

Witnesses:

Cmvi: W. Fainniimi, riviere-ino B. MARSHALL.

each having

